package com.jushu.storbox.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import com.jushu.storbox.R;
import com.jushu.storbox.constant.Constant;

public class FileTypeUtil {
	
	public final static Map<String, String> FILE_TYPE_MAP = new HashMap<String, String>();  
	
	private final static String TAG = "FileTypeUtil";
    
    private FileTypeUtil(){}     
    static{     
        getAllFileType(); 
    }     
         
    /**   
     * Discription:[getAllFileType] 
     */     
    private static void getAllFileType()     
    {     
        FILE_TYPE_MAP.put("ffd8ffe000104a464946", ".jpg"); //JPEG (jpg)     
        FILE_TYPE_MAP.put("ffd8ffe11ffe45786966", ".jpg"); //JPEG (jpg)     
        FILE_TYPE_MAP.put("ffd8ffe1143945786966", ".jpg"); //JPEG (jpg)     
        FILE_TYPE_MAP.put("ffd8ffe1019245786966", ".jpg"); //JPEG (jpg)     
        FILE_TYPE_MAP.put("89504e470d0a1a0a0000", ".png"); //PNG (png)     
        FILE_TYPE_MAP.put("47494638396126026f01", ".gif"); //GIF (gif)     
        FILE_TYPE_MAP.put("49492a00227105008037", ".tif"); //TIFF (tif)     
        FILE_TYPE_MAP.put("424d228c010000000000", ".bmp"); //16(bmp)     
        FILE_TYPE_MAP.put("424d8240090000000000", ".bmp"); //24(bmp)     
        FILE_TYPE_MAP.put("424d8e1b030000000000", ".bmp"); //256(bmp)     
        FILE_TYPE_MAP.put("41433130313500000000", ".dwg"); //CAD (dwg)     
        FILE_TYPE_MAP.put("3c21444f435459504520", ".html"); //HTML (html)
        FILE_TYPE_MAP.put("3c21646f637479706520", ".htm"); //HTM (htm)
        FILE_TYPE_MAP.put("48544d4c207b0d0a0942", ".css"); //css
        FILE_TYPE_MAP.put("696b2e71623d696b2e71", ".js"); //js
        FILE_TYPE_MAP.put("7b5c727466315c616e73", ".rtf"); //Rich Text Format (rtf)     
        FILE_TYPE_MAP.put("38425053000100000000", ".psd"); //Photoshop (psd)     
        FILE_TYPE_MAP.put("46726f6d3a203d3f6762", ".eml"); //Email [Outlook Express 6] (eml)       
        FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", ".doc"); //MS Excel ：word、msi、 excel 
        FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", ".vsd"); //Visio    
        FILE_TYPE_MAP.put("5374616E64617264204A", ".mdb"); //MS Access (mdb)      
        FILE_TYPE_MAP.put("252150532D41646F6265", ".ps");     
        FILE_TYPE_MAP.put("255044462d312e350d0a", ".pdf"); //Adobe Acrobat (pdf)   
        FILE_TYPE_MAP.put("2e524d46000000120001", ".rmvb"); //rmvb/rm
        FILE_TYPE_MAP.put("464c5601050000000900", ".flv"); //flv\f4v  
        FILE_TYPE_MAP.put("00000020667479706d70", ".mp4"); 
        FILE_TYPE_MAP.put("49443303000000002176", ".mp3"); 
        FILE_TYPE_MAP.put("000001ba210001000180", ".mpg"); //     
        FILE_TYPE_MAP.put("3026b2758e66cf11a6d9", ".wmv"); //wmv\asf    
        FILE_TYPE_MAP.put("52494646e27807005741", ".wav"); //Wave (wav)  
        FILE_TYPE_MAP.put("52494646d07d60074156", ".avi");  
        FILE_TYPE_MAP.put("4d546864000000060001", ".mid"); //MIDI (mid)   
        FILE_TYPE_MAP.put("504b0304140000000800", ".zip");  
        FILE_TYPE_MAP.put("504b0304140008000800", ".apk");//android apk
        FILE_TYPE_MAP.put("526172211a0700cf9073", ".rar");//rar
        FILE_TYPE_MAP.put("235468697320636f6e66", ".ini");//ini
        FILE_TYPE_MAP.put("504b03040a0000000000", ".jar");//jar
        FILE_TYPE_MAP.put("4d5a9000030000000400", ".exe");
        FILE_TYPE_MAP.put("3c25402070616765206c", ".jsp");
        FILE_TYPE_MAP.put("4d616e69666573742d56", ".mf");
        FILE_TYPE_MAP.put("3c3f786d6c2076657273", ".xml");
        FILE_TYPE_MAP.put("494e5345525420494e54", ".sql");
        FILE_TYPE_MAP.put("7061636b616765207765", ".java");
        FILE_TYPE_MAP.put("406563686f206f66660d", ".bat");
        FILE_TYPE_MAP.put("1f8b0800000000000000", ".gz");
        FILE_TYPE_MAP.put("6c6f67346a2e726f6f74", ".properties");
        FILE_TYPE_MAP.put("cafebabe0000002e0041", ".class");
        FILE_TYPE_MAP.put("49545346030000006000", ".chm");
        FILE_TYPE_MAP.put("04000000010000001300", ".mxp");
        FILE_TYPE_MAP.put("504b0304140006000800", ".docx");
        FILE_TYPE_MAP.put("d0cf11e0a1b11ae10000", ".wps");
        FILE_TYPE_MAP.put("6431303a637265617465", ".torrent");
          
        FILE_TYPE_MAP.put("6D6F6F76", ".mov"); //Quicktime (mov)  
        FILE_TYPE_MAP.put("FF575043", ".wpd"); //WordPerfect (wpd)   
        FILE_TYPE_MAP.put("CFAD12FEC5FD746F", ".dbx"); //Outlook Express (dbx)     
        FILE_TYPE_MAP.put("2142444E", ".pst"); //Outlook (pst)      
        FILE_TYPE_MAP.put("AC9EBD8F", ".qdf"); //Quicken (qdf)     
        FILE_TYPE_MAP.put("E3828596", ".pwl"); //Windows Password (pwl)         
        FILE_TYPE_MAP.put("2E7261FD", ".ram"); //Real Audio (ram) 
    }		  
	
	/**
	 * @param src
	 * @return
	 */
    private static String bytesToHexString(byte[] src) {
		StringBuilder stringBuilder = new StringBuilder();
		if (src == null || src.length <= 0) {
			return null;
		}
		for (int i = 0; i < src.length; i++) {
			int v = src[i] & 0xFF;
			String hv = Integer.toHexString(v);
			if (hv.length() < 2) {
				stringBuilder.append(0);
			}
			stringBuilder.append(hv);
		}
		return stringBuilder.toString();
	}
	
	/**
	 * @param filePath String
	 * @return
	 */
	public static String getFileType(String filePath){
		String res = null;
		FileInputStream is = null;
		try {
			is = new FileInputStream(filePath);
			byte[] b = new byte[10];
			is.read(b, 0, b.length);
			String fileCode = bytesToHexString(b);	
			
			System.out.println(fileCode);
			Iterator<String> keyIter = FILE_TYPE_MAP.keySet().iterator();
			while(keyIter.hasNext()){
				String key = keyIter.next();
				if(key.toLowerCase().startsWith(fileCode.toLowerCase()) || fileCode.toLowerCase().startsWith(key.toLowerCase())){
					res = FILE_TYPE_MAP.get(key);
					break;
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if(null != is) {
					is.close();
				}
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return res;
	}
	
	/**
	 * @param is InputStream
	 * @return
	 */
	public static String getFileType(InputStream is){
		String res = null;
		try {
//			FileInputStream is = new FileInputStream(filePaht);
			byte[] b = new byte[10];
			is.read(b, 0, b.length);
			String fileCode = bytesToHexString(b);	
			System.out.println(fileCode);
			Iterator<String> keyIter = FILE_TYPE_MAP.keySet().iterator();
			while(keyIter.hasNext()){
				String key = keyIter.next();
				if(key.toLowerCase().startsWith(fileCode.toLowerCase()) || fileCode.toLowerCase().startsWith(key.toLowerCase())){
					res = FILE_TYPE_MAP.get(key);
					break;
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if(null != is) {
					is.close();
				}
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return res;
	}
	
	/**
	 * @param b10 byte[]:no less than 10 byte
	 * @return
	 */
	public static String getFileType(byte[] b10){
		String res = null;
		try {
			if (b10 == null || 10 > b10.length) {
				return res;
			}
//			byte[] b = new byte[10];
//			is.read(b, 0, b.length);
			String fileCode = bytesToHexString(b10);
			
			Iterator<String> keyIter = FILE_TYPE_MAP.keySet().iterator();
			while(keyIter.hasNext()){
				String key = keyIter.next();
				if(key.toLowerCase().startsWith(fileCode.toLowerCase()) || fileCode.toLowerCase().startsWith(key.toLowerCase())){
					res = FILE_TYPE_MAP.get(key);
					break;
				}
			}
			if (null == res) {
				LogUtil.e(TAG, "not found file type that fileCode:" + fileCode);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		return res;
	}
	
	public static int getDefaultResourceId(String fileName) {
        int typeImgResId = R.mipmap.default_file_icon;
        if (PublicTools.isFileType(fileName, Constant.WORD_TYPE))
        {
            typeImgResId = R.mipmap.doc;
        }
        else if (PublicTools.isFileType(fileName, Constant.PPT_TYPE))
        {
            typeImgResId = R.mipmap.ppt;
        }
        else if (PublicTools.isFileType(fileName, Constant.IMAGE_TYPE))
        {
            typeImgResId = R.mipmap.empty_pic;
        }
        else if (PublicTools.isFileType(fileName, Constant.RAR_TYPE))
        {
            typeImgResId = R.mipmap.rar;
        }
        else if (PublicTools.isFileType(fileName, Constant.ZIP_TYPE))
        {
            typeImgResId = R.mipmap.rar;
        }
        else if (PublicTools.isFileType(fileName, Constant.VIDEO_TYPE))
        {
            typeImgResId = R.mipmap.video;
        }
        else if (PublicTools.isFileType(fileName, Constant.MUSIC_TYPE))
        {
            typeImgResId = R.mipmap.music;
        }
        else if (PublicTools.isFileType(fileName, Constant.TXT_TYPE))
        {
            typeImgResId = R.mipmap.txt;
        }
        else if (PublicTools.isFileType(fileName, Constant.PDF_TYPE))
        {
            typeImgResId = R.mipmap.pdf;
        }
        else if (PublicTools.isFileType(fileName, Constant.EXCEL_TYPE))
        {
            typeImgResId = R.mipmap.excel;
        }
        else
        {
            typeImgResId = R.mipmap.default_file_icon;
        }
        return typeImgResId;
	}
}